underflush

From under +‎ flush.

underflush (plural underflushes)

1. A tinge of colour showing through from beneath.
   • 1938, Norman Lindsay, Age of Consent, 1st Australian edition, Sydney, N.S.W.: Ure Smith, published 1962, →OCLC, page 50:

     Honey-coloured all over, with an underflush of vermilion at the cheeks and lips.